I’ve had two friends alert me (thanks!) to some information about a rapidly-developing sinkhole in Daisetta, Texas (a bit northeast of Houston). As of this morning it was ~400 m in diameter and ~60 m deep.
You can get a sense of the scale of the sinkhole from the photo above (from this article). Geologists preliminarily think this is likely related to collapse of salt domes in the subsurface. At the time of writing this post, those on the scene believe it’s growth is slowing down a bit. At one point it was deeping as much as 20 ft (6 m) per hour.
See update post here.
Check out this report from May 10, 2008, which discusses possible causes:
A company that sits near the edge of a massive sinkhole in Southeast Texas has been accused of violating permits for disposal of saltwater, which some geologists suggest may have caused the crater.
As a friend mentioned to me, an event like this stirs up memories of the famous Lake Peigneur incident, which I blogged about here.